package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.JwtClaimsConstant;
import com.sky.constant.MessageConstant;
import com.sky.constant.PasswordConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.dto.PasswordEditDTO;
import com.sky.entity.Employee;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.EmployeeMapper;
import com.sky.properties.JwtProperties;
import com.sky.result.PageResult;
import com.sky.service.EmployeeService;
import com.sky.utils.JwtUtil;
import io.jsonwebtoken.Claims;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;


import java.time.LocalDateTime;


@Service
public class EmployeeServiceImpl implements EmployeeService {

    @Autowired
    private EmployeeMapper employeeMapper;


    /**
     * 员工登录
     *
     * @param employeeLoginDTO
     * @return
     */
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();

        //1、根据用户名查询数据库中的数据
        Employee employee = employeeMapper.getByUsername(username);

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        //密码比对
        // TODO 后期需要进行md5加密，然后再进行比对
        password = DigestUtils.md5DigestAsHex(password.getBytes());
        if (!password.equals(employee.getPassword())) {
            //密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (employee.getStatus() == StatusConstant.DISABLE) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }

        //3、返回实体对象
        return employee;
    }



    /**
     * 新增员工
     * @param employeeDTO
     */
    @Override
    public void insert(EmployeeDTO employeeDTO) {
        Employee employee = new Employee();
        //属性拷贝
        BeanUtils.copyProperties(employeeDTO,employee);
        //设置初始状态
        employee.setStatus(StatusConstant.ENABLE);
        //设置初始密码，通过M5加密，初始密码为123456
        employee.setPassword(DigestUtils.md5DigestAsHex(PasswordConstant.DEFAULT_PASSWORD.getBytes()));
        //设置创建时间和修改时间
        employee.setCreateTime(LocalDateTime.now());
        employee.setUpdateTime(LocalDateTime.now());
        //设置创建人id
        employee.setCreateUser(BaseContext.getCurrentId());
        //设置修改人id
        employee.setUpdateUser(BaseContext.getCurrentId());
        employeeMapper.insert(employee);
    }


    /**
     * 查询员工
     * @param employeePageQueryDTO
     * @return
     */
    @Override
    public PageResult page(EmployeePageQueryDTO employeePageQueryDTO) {
        //使用分页插件分页
        PageHelper.startPage(employeePageQueryDTO.getPage(),employeePageQueryDTO.getPageSize());
        //去除空格
        if(employeePageQueryDTO.getName()!=null){
            employeePageQueryDTO.setName(employeePageQueryDTO.getName().trim());
        }
        Page<Employee> p = employeeMapper.page(employeePageQueryDTO.getName());
        //将返回的数据封装到PageResult类中
        PageResult pageResult = new PageResult(p.getTotal(),p.getResult());
        return pageResult;
    }

    /**
     * 启用禁用员工账号
     * @param status
     * @param id
     */
    @Override
    public void startOrStop(Integer status, Long id) {
        Employee employee = Employee.builder().status(status).id(id).build();
        employeeMapper.update(employee);
    }


    /**
     * 根据id查询员工信息
     * @param id
     * @return
     */
    @Override
    public Employee selectById(Long id) {
        Employee employee = employeeMapper.selectById(id);
        return employee;
    }


    /**
     * 修改员工
     * @param employeeDTO
     */
    @Override
    public void update(EmployeeDTO employeeDTO) {
        Employee employee = new Employee();
        //属性拷贝
        BeanUtils.copyProperties(employeeDTO,employee);
        employeeMapper.update(employee);
    }


    /**
     * 修改员工密码
     * @param passwordEditDTO
     */
    @Override
    public void updatePassword(PasswordEditDTO passwordEditDTO) {
        //将旧密码与新密码进行对比，相同则直接抛出异常
        if(passwordEditDTO.getOldPassword().equals(passwordEditDTO.getNewPassword())){
            throw new PasswordErrorException("旧密码与新密码不能相同，请重新输入");
        }

        //获取当前登录用户的id
        Long empId = BaseContext.getCurrentId();
        passwordEditDTO.setEmpId(empId);
        //将旧密码通过MD5加密进行编译
        passwordEditDTO.setOldPassword(DigestUtils.md5DigestAsHex(passwordEditDTO.getOldPassword().getBytes()));
        //通过id与旧密码进行查询数据
        Employee employee = employeeMapper.getByIdAndOld(passwordEditDTO);
        //如果不为空证明旧密码正确
        if(employee != null){
            //将新密码通过MD5加密进行编译
            passwordEditDTO.setNewPassword(DigestUtils.md5DigestAsHex(passwordEditDTO.getNewPassword().getBytes()));
            //将新密码插入数据库
            employee.setPassword(passwordEditDTO.getNewPassword());
            employeeMapper.update(employee);
        }else {
            //走到这里证明旧密码错误，返回错误信息
            throw new PasswordErrorException(MessageConstant.PASSWORD_EDIT_FAILED);
        }

    }

}
